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Author Topic: Convert DRZ 400 SM to dirt friendly  (Read 784 times)

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Offline saklx650c

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Convert DRZ 400 SM to dirt friendly
« on: October 22, 2012, 01:17:31 pm »
Hi, is it possible to convert an sm model to something that can handle the transkei tracks, river crossing, mud and alike? Also I heard that because of the different carbs the SM does not perform that well compared with the e model (19bhp or something like that). I also saw on Advrider that the front brake rotor can be a problem.  Any advise would be welcomed.
Thanks - I may need to look at a name change - sadrz400smconvertedtoe - or something like that.
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Offline Grumpleton

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Re: Convert DRZ 400 SM to dirt friendly
« Reply #1 on: October 26, 2012, 07:51:20 am »
Sm has smaller front wheel you will need to change to a 21inch front wheel then the bike will be fine, same motor
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Offline lecap

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Re: Convert DRZ 400 SM to dirt friendly
« Reply #2 on: October 26, 2012, 09:28:11 am »
Different suspension, different wheel rim sizes (front smaller on the SM, bith rims considerably wider on the SM).
You can fit E wheels onto an SM whilst retaining the SM front brake rotor. I think Bus here in CT had this setup (or was it the other way around ??? )

The S and SM DRZ use other carbs that the E and run a slightly lower compression ratio. I don't think this will prevent you from converting the SM to a DS bike, more of an issue if you want to race. The standard DRZ S and SM make good enough power to be fun to ride.
You can still upgrade and tune further with gimmicks like hot cams and maybe a Yoshi pipe if you feel the need and have the dosh.
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Offline MildDog

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Re: Convert DRZ 400 SM to dirt friendly
« Reply #3 on: October 30, 2012, 08:46:25 am »
It has been done.

N[]va did it. Superfoxi in cape town did the (rather excellent) work on the forks.

The SM and S models come out with a lower-spec butterfly carb. The E model came stock with an FCR card. The S is an offroad bike, it is tamer and has lower compression, so probably a more stable engine. The carb is not a reason you can't do the conversion.

The front brake rotor (and rear) are much larger than on the E-models. The only time that would concern me is doing very technical rocky sections, if you're not doing that stuff, I don't think it should be an issue.

You need to create brackets / modified pieces to hold the narrower rims steady on the SM axles.

The SM has much nicer suspension than the E. So once done, could be more capable than the E?!?!
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Offline N[]vA

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Re: Convert DRZ 400 SM to dirt friendly
« Reply #4 on: October 31, 2012, 08:18:05 am »
SM suspension is straight from the RMZ

the other option is always there.... loads of fun  :ricky:
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Offline saklx650c

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Re: Convert DRZ 400 SM to dirt friendly
« Reply #5 on: October 31, 2012, 04:12:10 pm »
SM suspension is straight from the RMZ

the other option is always there.... loads of fun  :ricky:


That option looks great, and then slicks for weekend track day.  I like it.  Acerbis indicate that the 16l tank is not for the s and the sm versions.  Why would that be? different seat or frame mounting points maybe?
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Offline N[]vA

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Re: Convert DRZ 400 SM to dirt friendly
« Reply #6 on: October 31, 2012, 04:48:54 pm »
SM suspension is straight from the RMZ

the other option is always there.... loads of fun  :ricky:


That option looks great, and then slicks for weekend track day.  I like it.  Acerbis indicate that the 16l tank is not for the s and the sm versions.  Why would that be? different seat or frame mounting points maybe?
Different mounting points on the frame, the radiators are also different sizes.

I have a tank for an E I started mounting to mine before I left SA, really not that hard to add what you need to use an E tank
« Last Edit: October 31, 2012, 04:49:48 pm by N[]vA »
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Offline saklx650c

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Re: Convert DRZ 400 SM to dirt friendly
« Reply #7 on: October 31, 2012, 08:43:33 pm »
thanks, quite a few sm's for sale which are young  with low mileage.  If the stable grows, I will bear this in mind and keep you posted.
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Offline N[]vA

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Re: Convert DRZ 400 SM to dirt friendly
« Reply #8 on: November 01, 2012, 04:57:48 am »
thanks, quite a few sm's for sale which are young  with low mileage.  If the stable grows, I will bear this in mind and keep you posted.
Kewl and if you ever want to convert straight to dirt wheels shout and you can have my spacers measured or remade
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Offline saklx650c

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Re: Convert DRZ 400 SM to dirt friendly
« Reply #9 on: November 01, 2012, 09:33:53 am »
Cool
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